in·scru·ta·ble /ɪnˈskrutəbəl/
 (a.)難以瞭解的,不能預測的


 In·scru·ta·ble a.  Unsearchable; incapable of being searched into and understood by inquiry or study; impossible or difficult to be explained or accounted for satisfactorily; obscure; incomprehensible; as, an inscrutable design or event.
 'T is not in man
 To yield a reason for the will of Heaven
 Which is inscrutable.   --Beau. & Fl.
    Waiving a question so inscrutable as this.   --De Quincey.

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 inscrutable
      adj : of an obscure nature; "the new insurance policy is written
            without cryptic or mysterious terms"; "a deep dark
            secret"; "the inscrutible workings of Providence"; "in
            its mysterious past it encompasses all the dim origins
            of life"- Rachel Carson; "rituals totally mystifying to
            visitors from other lands" [syn: cryptic, cryptical,
             deep, mysterious, mystifying]